package com.sky.service.impl;

import cn.hutool.core.util.StrUtil;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.BaseException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import com.sky.vo.EmployeeVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.Date;
import java.util.List;
import java.util.stream.Collectors;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // 对前端传过来的明文密码进行md5加密处理
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    @Override
    public PageResult pageQuery(Integer page, Integer pageSize, String name) {
        // 1、设置分页参数
        PageHelper.startPage(page, pageSize);

        // 2、查询数据库
        Page<Employee> employeePage = employeeMapper.pageQuery(name);
        // 脱敏
        List<EmployeeVO> employeeVOS = employeePage.stream().map(employee -> {
            EmployeeVO employeeVO = new EmployeeVO();
            BeanUtils.copyProperties(employee, employeeVO);
            return employeeVO;
        }).collect(Collectors.toList());
        PageResult pageResult = new PageResult();
        pageResult.setTotal(employeePage.getTotal());
        pageResult.setRecords(employeeVOS);

        return pageResult;
    }

    /**
     * 新增员工
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {


        System.out.println("当前线程id:" + Thread.currentThread().getId());


        Employee employee = new Employee();
        String username = employeeDTO.getUsername();
        if (employeeMapper.getByUsername(username) != null) {
            throw new AccountNotFoundException("用户名已存在");
        }

        BeanUtils.copyProperties(employeeDTO, employee);
        employee.setStatus(StatusConstant.ENABLE);
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());
//
//        // 设置当前登录用户id
//        employee.setCreateUser(BaseContext.getCurrentId());
//        employee.setUpdateUser(BaseContext.getCurrentId());     // 取出线程共享id
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        employeeMapper.save(employee);
    }

    @Override
    public void changeStatus(Integer status, Long id) {
        Long currentId = BaseContext.getCurrentId();
        if(currentId != 1L) {
            throw new BaseException(MessageConstant.NO_AUTH);
        }
        employeeMapper.updateStatus(status, id);
    }

    @Override
    public EmployeeVO getById(Long id) {
        EmployeeVO employeeVO = new EmployeeVO();
        Employee employee = employeeMapper.getById(id);
        BeanUtils.copyProperties(employee, employeeVO);
        return employeeVO;
    }

    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);
        // 加上之前没有的信息
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateUser(BaseContext.getCurrentId());
        // System.out.println("用户信息" + employee);
        employeeMapper.update(employee);
    }

    @Override
    public void editPassword(PasswordEditDTO passwordEditDTO) {
        Long currentId = BaseContext.getCurrentId();
        if(passwordEditDTO.getEmpId() != null && passwordEditDTO.getEmpId() != currentId) {
            throw new BaseException(MessageConstant.NO_AUTH);
        }
        passwordEditDTO.setEmpId(currentId);
        // 密码不能为空
        if(!StrUtil.isNotBlank(passwordEditDTO.getOldPassword())) {
            throw new BaseException(MessageConstant.PASSWORD_NOT_NULL);
        }
        // 确认密码不能为空
        if(!StrUtil.isNotBlank(passwordEditDTO.getNewPassword())) {
            throw new BaseException(MessageConstant.PASSWORD_NOT_NULL);
        }

        Employee currentEmploy = employeeMapper.getById(passwordEditDTO.getEmpId());
        String password = currentEmploy.getPassword();

        if(!password.equals(DigestUtils.md5DigestAsHex(passwordEditDTO.getOldPassword().getBytes()))) {
            throw new BaseException(MessageConstant.PASSWORD_ERROR);
        }

        if(passwordEditDTO.getNewPassword().equals(passwordEditDTO.getOldPassword())) {
            throw new BaseException(MessageConstant.PASSWORD_EDIT_FAILED + ",新密码与旧密码相同");
        }



        Employee employee = Employee.builder()
                .password(DigestUtils.md5DigestAsHex(passwordEditDTO.getNewPassword().getBytes()))
                .id(passwordEditDTO.getEmpId())
                .build();
        employeeMapper.update(employee);

    }

}
